diff --git a/index.d.ts b/index.d.ts
index 0075141c9..bfd524fd4 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -61,7 +61,7 @@ export interface PresentLocalNotificationDetails {
 }
 
 export interface ScheduleLocalNotificationDetails {
-  fireDate: Date;
+  fireDate: string; // Use Date.toISOString() to convert to the expected format
   alertBody: string;
   alertAction: string;
   soundName?: string;